Glycinebetaine stabilizes the association of extrinsic proteins with the photosynthetic oxygen‐evolving complex
- 16 January 1992
- journal article
- Published by Wiley in FEBS Letters
- Vol. 296 (2) , 187-189
- https://doi.org/10.1016/0014-5793(92)80376-r
Abstract
The photosynthetic oxygen-evolving activity of the photosystem 2 complex, prepared from spinach, was labile when the complex was exposed to high-salt conditions under which the extrinsic proteins were dissociated from the complex. Glycinebetaine prevented the dissociation of the 18-kDa and the 23-kDa extrinsic proteins from the photosystem 2 complex in the presence of 1 M NaCl. It also prevented the dissociation of the 33-kDa extrinsic protein from the complex in the presence of 1 M MgCl2 or 1 M CaCl2. The oxygen-evolving activity of the photosystem 2 complex was stabilized by glycinebetaine when the complex was subjected to treatment with NaCl and MgCl2.Keywords
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